Lubricating apparatus



Filed Feb; 1, 1923 l'wvenior:

,Fred 5. 001x 7 wflw wzya Patented Oct. 4, 1927.

UNITED STATES PATENT OFFICE.

FRED s. CARR, or NEWTON, MASSACHUSETTS, essroivoa, BY MESNE ASSIGNMENTS,

TO THE BASSIGK MANUFACTURING COMPANY, or CHICAGQ, ILLINOIS, A CORPORA- TION OF DELAWARE.

LUBRIGATING AIPARATUS.

Application fil ed February 1, 1923. Serial No. 616,291.

This invention pertains to improvements in lubricating apparatus and more particularly, though not exclusively, to lubricating apparatus of the type adapted for quick connection to and disconnection from lubricating nipples adapted to receive lubricant under pressure. It is among the ob ects of the invention to provide a lubricant gun wherein manual operation of forclng out lubricant and/0r attachment to and detachment from the lubricant-receiving nipple are facilitated.

In the'drawings, which show a preferred form of one embodiment of my invention:

Figure 1 is a side elevation of a lubricant un; Y b Fig. 2 is a section on the line 22 of Fig.

. 1, being partly in elevation: V

Fig. .3 is a section on the line 3-3 of Fig. 2;

Fig. 4 is a section similar to Fig. 3, showing the parts in different relation to each other;

Fig. 5 is a section on the line 5-5 of Fig. 2, being partly in elevation;

Fig. 6 is a section on the line 66 of Fig. 2. being partly in elevation; I

Figs. 7 and 8 are sections similar to Fig. 6, but showing the parts in different relation to each other; 7 T

Fig. 9 shows a detail of ratchet mechanism hereinafter described; and

Figs. 10 and 11 are central longitudinal sections of the rear head of the gun showing modifications of-my invention.

Referring to the drawings and ;to the preferred form of my invention selected for illustrative purposes. I have shown a lubricant gun including a barrel 12 and nozzle 13 adapted for coact-ion with the lubricantreceiving nipple. which may resemble that shown in the application of Howard J. Murphv. Serial No. 543.656. filed Mar. '14. 1922. I have provided means for opposing undesired rotation of the piston 14 and threaded piston stem 15 in one or more directions. and a. ratchet device operativelv interposed between the threaded stem 15 and handle 16 of the gun. so that the piston stem 15 may be rotated in lubricantexpelling directionbv oscillatory movementof the handle 16, thus rendering unnecessary the release grip of the handle durilit :r'eaahaion thereof.

I will first describe the means for controlling turning movement of the threaded piston stem 15. WVithin the rear head 17 of the gun, I have provided a washer 18 provided at its periphery with ratchet teeth.

' l his washer is preferably splined by aproection 19 (Figs. 3 and 4) to a groove 20 in the threaded piston stem 15. Cooperating direction asviewed in Fig. 3, while permittingsuch turning movement in clockwise direction. When the pawl 21 is withdrawn, asviewed in Fig. 4, the stem 15 may be turned'relative to the head 17 in either direction. When the'stem 15 is being turned in clockwise direction to expel lubricant from the barrel 12, the ratchet 21'is preferably in the position shown in Fig. 3 so that turning of'said stem in the opposite direction ,will turn the head 17, the barrel 12 and nozzle 13 in counterclockwise direction to effect disengagement between the nozzle and ,the'nipple. The withholding of the pawl 21 may conveniently be effected by sliding longitudinally a cam plate 30 engaged be-. neath'the head of said pawl, while movement of the pawl in the opposite direction may be "effected by the usual pawl spring. With a view to rendering unnecessary release of the handle of the gun during considerable turning movement of the piston 14 in one or more directions, I haveprovided ratchet mechanism operatively interposed between the threaded stem 15 and the handle 16. This ratchet mechanism may be of a type ordinarily used in connection with ratchet screw drivers and include'the ratchet wheel 31 non-rotatably fixed relative to the shank 32 of the threaded stem 15.v The handle 16 may provide an outer sleeve 33 surrounding the ratchet mechanism and having attached thereto a sleeve 34 slotted at 36 to receive ratchet pawls S8 and 39 Theconnection between the handle and. the slotted. sis-we at be changed bymovinga pin 40 connected to the slottedsleeve'fi l' and passing through a slot in the handle sleeve 33 (see Flg. 1). When the .pin 40 is at one end of the slot, the

ratchet 38 is thrown out of commissiomas shown in'Fig. 7, the ratchet 39 being operative and permitting rotation of the handle in contraclockwise direction relative to the shank spindle 32, hile locking these parts together during rotation of the handle in the opposite direction. Thus, wvhen the pawls' a-re in the relation-shown :in Fig.7, oscillation of the handle Will produce intermittent rotation of the threaded spindle 15 in counterclockwise direction, and Where a right-hand "thread is usedto forcethe piston 14 forwardly in the barrel'12 t0 expel lubricant. When .the :pin is'in inter-. mediate position in itssl'ot, both the pawls38 and 39 are"infengagementwith the ratchet teeth and no rotation of the handle relative to the shank or threaded piston is permitted. \Vhen the: pin {10' is at the other end of its slot,' the pawl 39-is thrown out-of commission and the pawl 38' permits rotation of the handle" relative to the shank in clockwise direction, as vieWedin'Fig. 8, While pro cluding movement in the --opposite direction. This," therefore, is the proper setting when the'piston llis being Withdrawn in its cylinder preparatory torefilllng th'e 'latter with lubricant.

For-somezpurposes, the ratchet in the handlei may be used independently of the ratchet 'in the liead'l'l' and vicev'crsa, but

IT-prefer a combination'of thetwo, especially Where the threadedengagement between the piston 'stem 1 5 and rear head 17 is relatively V ally opposing rotationbetvveen the piston loose.

=In Figs. 10 and 11,1 have shovvn'a modirication taking the place of the ratchet -ar rangement in the rear head i 17 such modiiicat'ion. includlngmerelyme'ans'for fr1ct1onstein and head, this retardation to beefi'ectedvvvherethere is a tendency-for the piston 14e to turn'relative to the barrel 12imore easily than the nozzle 13: tends toiturn relative to its engaged nipple during disengagement. The locking arrangement shown -in Figs. 10. and 1.1 therefore lncludesispring' fingers 50, Slfrictionallypressing against the vexterioreofthe threads on the piston stem. 15. If desireduI may provide means tor throwing these frictional retarding idev-ices out of operation, .anditothis end I haveshown a longitudinally slidable sleeve 53providing a slot 54 in whichis engaged a pin 55 permitting limited longitudinal movement, the sleeve 53 presenting a ring 56 which, when slid to the position shown in Fig. 11, holds the spring fingers 50' out of operation while permitting their operation when slid back to the position shown in .Fig. 10.

While I have shown and described a preferred form of one embodiment of my invent-ion itwvill be understood that major changes, including omission, alteration, substitutlonaand' reversal of parts, and even changes in the mode of operation, may be said handle to said stem when said handle;

is rotated toconnect or disconnect said compressor with alubricant receiving nipple, and means connecting said barrel and saidstomxand serving to prevent backward rotation of said stem When said means is fixed i i-one. position, said means resisting the forward rotation of said stem sufliciently to permit aiconnection to be formed between said compressor and saidnipple by merely turning said handle.

2. Ailubricant compressor comprising a barrel, a lubricant expelling piston therein, a threaded stem connected to: saidpiston, a rear head for said barrel, said head having a recess therein, a asher interlocked with said threaded stemand located in said recess, ratchet 'andnpavvl means operatively carried by saidheadvand washer to permitturning i movement of said washer relative'to said head in one direction-While opposing such tnrningmovement in the opposite direction, and spring meansiengaging said head retaining said Washer in said recess.

In testimonywhereof, I have signed my name to this specification. 7

FRED S. CARE. 7 

